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Finding the Fourth Proportional to 268,206.70, 402,310.05 and 143,790.70

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Solution

The fourth proportional to 268,206.70, 402,310.05 and 143,790.70 is: 215,686.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,206.70 : 402,310.05 = 143,790.70 : x
  2. Step 2: Convert to fraction form
    268,206.70/402,310.05 = 143,790.70/x
  3. Step 3: Cross multiply
    268,206.70x = 402,310.05 × 143,790.70
  4. Step 4: Simplify right side
    268,206.70x = 57,848,443,706.54
  5. Step 5: Solve for x
    x = 57,848,443,706.54/268,206.70
  6. Step 6: Final answer
    x = 215,686.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.